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World Journal of Hepatology 2020年第11期12卷 1046-1054页

作者： Kazuo tarao Akito Nozaki Hirokazu Komatsu tatsuji Komatsu Masataka taguri Katsuaki tanaka Makoto Chuma kazushi Numata Shin Maeda Department of Gastroenterology Tarao’s Gastroenterological ClinicYokohama 241-0821Japan Gastroenterological Center Yokohama City University Medical CenterYokohama 232-0024Japan Department of Gastroenterology Yokohama Municipal Citizen’s HospitalYokohama 221-0855Japan Department of Clinical Research National Hospital Organization Yokohama Medical CenterYokohama 245-8575Japan Department of Data Science Yokohama City University School of Data ScienceYokohama 236-0004Japan Department of Gastroenterology Hadano Red Cross HospitalKanagawa 221-0045Japan Department of Gastroenterology Yokohama City University Graduate School of MedicineYokohama 236-0004Japan

BACKGROUND In hepatocellular carcinoma(HCC),detection and treatment prior to growth beyond 2 cm are relevant as a larger tumor size is more frequently associated with microvascular invasion and/or *** to examine the impact of the tumor marker alpha-fetoprotein(AFP)or PIVKA-II in detecting very small HCC nodules(≤2 cm in maximum diameter,Barcelona stage 0)in the large number of very small *** difference in the behavior of these tumor markers in HCC development was also *** A total of 933 patients with single-nodule HCC were *** were subdivided into 394 patients with HCC nodules≤2 cm in maximum diameter and 539 patients whose nodules were>2 *** rates of patients whose AFP and PIVKA-II showed normal values were *** the positive ratio of the marker PIVKA-II was significantly different(Ptween patients with nodules≤2 cm in diameter and those with nodules>2 cm,but there was no significant difference in AFP(P=0.4254).In the patients whose tumor was≤2 cm,50.5%showed normal levels in AFP and 68.8%showed normal levels in *** 36.4%of those patients,both AFP and PIVKA-II showed normal *** PIVKA-II-positive ratio was markedly increased with an increase in the tumor *** contrast,the positivity in AFP was increased gradually and *** In the surveillance of very small HCC nodules(≤2 cm in diameter,Barcelona clinical stage 0)the tumor markers AFP and PIVKA-II are not so useful.

关键词： Hepatocellular carcinoma AFP PIVKA-II Barcelona clinical stage tumor markers

Effect of Different Eggshell Powder on Appearance of Eggshell Maki-e

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Materials Sciences and Applications 2013年第2期4卷 138-144页

作者： Yutaro Shimode Chieko Narita Atsushi Endo kazushi Yamada Department of Advanced Fibro-Sci- ence Kyoto Institute of Technology Kyoto Japan Department of Advanced Fibro-Sci- ence Kyoto Institute of Technology Kyoto Japan. Department of traditional Arts and Crafts Kyoto College of Arts and Crafts Kyoto Japan

the Maki-e technique with eggshell powder is one of techniques of Japanese traditional Urushi (Japanese lacquer) crafts. However, this technique is relatively new in the history of Maki-e, and there are no prior researches in terms of materials, structure, and properties. In this research, therefore we have aimed to evaluate the relationship between the eggshell powder sizes, dispersion, and color shade in Maki-e with eggshell powder. the difference between hen’s and quail’s eggshell characteristics and the effect of their powder particle size on appearance of eggshell Maki-e were discussed on the basis of the results of the particle size, circularity, particle number, and RGB value. As a result, it was found that the occupancy of the eggshell powder on the surface depends on not particle number but the particle size, whereas the whiteness of both eggshell powders depends on the particle size.

关键词： Urushi (Japanese Lacquer) Maki-e Eggshell Powder traditional Crafts

Synthesis of Polysilanes Using Mg and Lewis Acid and the Consideration of this Reaction Mechanism

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Materials Sciences and Applications 2015年第6期6卷 576-590页

作者： Hiroaki Murase Masayuki Sugimoto Hiroyuki Nishimura kazushi Yamada Osaka Gas Co. Ltd. Osaka Japan Advanced Fibro-Science Kyoto Institute of Technology Kyoto Japan

Reduction of dichlorosilanes with Mg metal in the presence of LiCl and Lewis acid such as FeCl2 or ZnCl2 was found to be the highly practical method for the synthesis of polysilanes (PS). this method is so useful and practical that PS can be prepared by stirring dichlorosilanes at room temperature. this method was successfully applied for the synthesis of various types of PS having a linear structure, a cyclic structure and silane-styrene copolymers as another type of PS. the structure of the reaction intermediates was also analyzed. At the initiation stage the results of FD-MS (Field desorption mass spectrometry) and GPC (Gel permeation chromatography) showed that linear oligomers were mainly formed by stepwise reactions, and then the high polymers and cyclic oligomers were formed in parallel.

关键词： Polysilane Magnesium Lewis Acid Catalysts

Function and Cryo-EM structures of broadly potent bispecific antibodies against multiple SARS-CoV-2 Omicron sublineages

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Signal transduction and targeted therapy 2023年第8期8卷 3580-3583页

作者： Ping Ren Yingxia Hu Lei Peng Luojia Yang kazushi Suzuki Zhenhao Fang Meizhu Bai Liqun Zhou Yanzhi Feng Yongji Zou Yong Xiong Sidi Chen Department of Genetics Yale University School of MedicineNew HavenCTUSA System Biology Institute Yale UniversityWest HavenCTUSA Department of Molecular Biophysics and Biochemistry Yale UniversityNew HavenCTUSA

Dear Editor,SARS-CoV-2 rapidly evolves during the pandemic1 with many variants of concern(VoCs)lineages(Supplementary Fig.S1a).Omicron(B.1.1.529)and its sub-lineages led to multiple infection waves globally.2 Omicron subvariants harbored a high number of mutations,especially in the spike(S)glycoprotein,and clustered in the receptor-binding domain(RBD)(Supplementary Fig.S1b,c;Supplemental Discussion).these subvariants drastically decrease the efficacy of current vaccinations and monoclonal antibody therapies.

关键词： multiple globally harbor

Development of Cockleshell-Derived CaCO<sub>3</sub>for Flame Retardancy of Recycled PEt/Recycled PP Blend

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Materials Sciences and Applications 2011年第2期2卷 59-69页

作者： Supaphorn thumsorn kazushi Yamada Yew Wei Leong Hiroyuki Hamada 不详

Recycled polyethylene terephthalate (RPEt) and recycle polypropylene (RPP) blends filled with a renewable filler, i.e. cockleshell-derived CaCO3 (CS) were prepared as an environmental friendly thermoplastic composite. the effects of CS particle size and content on thermal stability, mechanical performance and flame retardant properties of the blends were investigated. thermogravimetric analysis was performed to elucidate the thermal decomposition kinetics of the filled composites. the iso-conversion of the Flynn-Wall-Ozawa was developed by the second order polynomial function for thermal oxidative degradation of the blends while peak derivative temperature from the Kissinger method was able to verify the mechanism of degradation in these blends. the results indicated that both CS and commercial grade CaCO3 improved thermal stability and enhanced the stiffness as well as impact performance of the blends. However, this could only be achieved when high filler content was present in the RPEt/RPP blends.

关键词： Cockleshell Aragonite CaCO3 thermal Decomposition Kinetic Polymer Blend Flame Retardancy

the Relationship between Bulk Property and Property Distribution in thin-Wall Injection Molded PP at Different Molecular Weight and Molecular Weight Distribution

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Advances in Materials Physics and Chemistry 2016年第1期6卷 1-8页

作者： Keisuke Maeda Koji Yamada kazushi Yamada Masaya Kotaki Hiroyuki Nishimura Department of Advanced Fibro Science Kyoto Institute of Technology Kyoto Japan Osaka Municipal technical Research Institute Osaka Japan Center for Fiber and textile Science Kyoto Institute of Technology Kyoto Japan Kaneka US Material Research Center Kaneka Americas Holding Inc. TX USA

thin-wall injection molded parts have been paid much attention to the lightweight saving from viewpoints of natural resources saving. In the injection molding, skin-core structure can be found in the parts. this skin-core structure affects the property of completed injection molding parts (bulk property) even if in thin-wall injection molding. However, there is a few research about the relationship between bulk property and internal property distribution in the injection molding specimen. In this study, thin-wall injection molded parts of polypropylene (PP) were prepared by 4 different molecular weight and molecular weight distribution to reveal the relationship between bulk property and property distribution. these characteristics were investigated by using tensile test, fracture toughness characterized by Essential Work of Fracture (EWF) method for bulk property and film tensile test by sliced sample for tensile property distribution. the property distribution test results revealed that the highly bulk property sample had thicker highly mechanical property layer on its surface.

关键词： Molecular Weight Molecular Weight Distribution Fracture toughness Property Distribution thin-Wall Injection Molding

Prospective study of differential diagnosis of hepatic tumors by pattern-based classification of contrast-enhanced sonography

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World Journal of Gastroenterology 2006年第39期12卷 6290-6298页

作者： kazushi Numata tetsuo Isozaki Manabu Morimoto Kazuya Sugimori Reiko Kunisaki toshio Morizane Katsuaki tanaka Gastroenterological Center Yokohama City University Medical Center Yokohama 232-0024 Japan Department of Medicine Kanagawa Dental College Yokosuka 238-0003 Japan

AIM: to prospectively evaluate the usefulness of a pattern-based classification of contrast-enhanced sonographic findings for differential diagnosis of hepatic tumors. MEtHODS: We evaluated the enhancement pattern of the contrast-enhanced sonography images in 586 patients with 586 hepatic lesions, consisting of 383 hepatocellular carcinomas, 89 metastases, and 114 hemangiomas. After injecting a galactose-palmitic acid contrast agent, lesions were scanned by contrast- enhanced harmonic gray-scale sonography in three phases: arterial, portal, and late. the enhancement patterns of the initial 303 lesions were classified retrospectively, and multiple logistic regression analysis was used to identify enhancement patterns that allowed differentiation between hepatic tumors. We then used the pattern-based classification of enhancement we had retrospectively devised to prospectively diagnose 283 liver tumors. RESULtS: Seven enhancement patterns were found to be significant predictors of different hepatic tumors. the presence of homogeneous or heterogeneous enhancement both in the arterial and portal phase was the typical enhancement pattern for hepatocellular carcinoma, while the presence of peritumoral vessels in the arterial phase and ring enhancement or a perfusion defect in the portal phase was the typical enhancement pattern for metastases, and the presence of peripheral nodular enhancement both in the arterial and portal phase was the typical enhancement pattern forhemangioma. the sensitivity, specificity, and accuracy of prospective diagnosis based on the combinations of enhancement patterns, respectively, were 93.2%, 96.2%, and 94.0% for hepatocellular carcinoma, 87.9%, 99.6%, and 98.2% for metastasis, and 95.6%, 94.1%, and 94.3% for hemangioma. CONCLUSION: the pattern-based classification of the contrast-enhanced sonographic findings is useful for differentiating among hepatic tumors.

关键词： Contrast-enhanced sonography Hepatocellular carcinoma Metastasis Hemangioma

Study on the Appearance and Peel Strength of Byakudan-Nuri Works

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Materials Sciences and Applications 2014年第2期5卷 81-85页

作者： Chieko Narita Atsushi Endo Yutaro Shimode kazushi Yamada Department of Advanced Fibro-Science Kyoto Institute of Technology Kyoto Japan Kyoto Research Institute of Natural Lacquer Cultural Properties Kyoto Japan

this paper focuses on Byakudan-nuri, one of the traditional decoration techniques of Japanese Urushi (Urushi natural lacquer) crafts. Works produced by Byakudan-nuri express a unique luster color owing to painting gold or silver leaves along with highly transparent Urushi. the specific problem of Byakudan-nuri is the exfoliation of Urushi off the metal leaf surface, to solve a lot of repair work which is done nowadays. For Byakudan-nuri, silver leaf is preferred to a gold leaf. this paper tries to clarify the influence of the different kinds of metal leaves on the appearance and peel strength of works of Byakudan-nuri and, moreover, to elucidate the reason why silver leaf has been used more frequently for Byakudan-nuri until now. It was found out that the reason for the more frequent use of silver leaf in Byakudan-nuri is that silver does not seem to affect the appearance and peel strength in works produced by this technique.

关键词： Urushi (Urushi Natural Lacquer) Gold tooling Byakudan-Nuri traditional Crafts

Effect of Molecular Weight and Molecular Distribution on Skin Structure and Shear Strength Distribution near the Surface of thin-Wall Injection Molded Polypropylene

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Open Journal of Organic Polymer Materials 2016年第1期6卷 1-10页

作者： Keisuke Maeda Koji Yamada kazushi Yamada Masaya Kotaki Hiroyuki Nishimura Department of Advanced Fibro-Science Kyoto Institute of Technology Kyoto Japan Osaka Municipal technical Research Institute Osaka Japan Center for Fiber and textile Science Kyoto Institute of Technology Kyoto Japan Kaneka US Material Research Center Kaneka Americas Holding Inc. College Station TX USA

In this study, the relationship between skin structure and shear strength distribution of thin-wall injection molded polypropylene (PP) molded at different molecular weight and molecular distribution was investigated. Skin-core structure, cross-sectional morphology, crystallinity, crystal orientation, crystal morphology and molecular orientation were evaluated by using polarized optical microscope, differential scanning calorimeter, X-ray spectroscopic analyzer and laser Raman spectroscopy, respectively, while the shear strength distribution was investigated using a micro cutting method called SAICAS (Surface And Interfacial Cutting Analysis System). the results indicated that the difference of molecular weight and molecular weight distribution showed own skin layer thickness. Especially, high molecular weight sample showed thicker layer of the lamellar orientation and molecular orientation than low molecular weight sample. In addition, wide molecular distribution sample showed large crystal orientation layer.

关键词： Polypropylene thin-Wall Injection Molding Molecular Weight and Molecular Weight Distribution Skin-Core Structure Shear Strength Distribution